United Nations, General Assembly, Measures to Prevent International Terrorism Which Endangers or Takes Innocent Human Lives or Jeopardizes Fundamental Freedoms and Study of the Underlying Causes of Those Forms of Terrorism: Report of the Secretary-General: Convening Under the Auspices of the United Nations, an International Conference to Define Terrorism and to Differentiate it From the Struggle of Peoples for National Liberation: Report of the Secretary-General, U.N. Doc. A/46/346 (30 Aug. 1991)